There is no thinker, there is just thinking.
One knows ones thinking for thinking arises out of the self, and the self, arises out of consciousness.
Consciousness knowing of its formless origin and Sees all things arise out of the formless origin.
Consciousness in itself is the first division of oneness coming to know itself, symbolised as the son knowing the Father.
Awareness aware of the underlying being of all things has become the primary, and profound knowing that is, as it is, independant of mind, for the reflection of reality is itself the knowing that I am.
As a reflection there is the existance of that, that is prior to all existance. Paradoxical identity of awareness existing and non existing.